Design of Multiple Coupling Interference Suppression Method for Low Voltage Transmission Line Carrier Communication
The communication process of low-voltage transmission lines is described as a time-varying process with inherent complex coupling and the presence of time delay,which brings difficulties to the identification and suppression of coupled interference signals.In the process of coupling interference suppression,the set filtering threshold is relatively fixed,and the interference suppression process is usually affected by multiple coupling factors,endangering the stability of wire carrier communication.Propose a multi coupling interference suppression method for low-voltage transmission line carrier communication.Construct a low-voltage transmission line carrier communication channel model to obtain noisy carrier communication signals.Extracting multi coupling interference signals from carrier communication signals using sparse sampling algorithms.Due to the similarity between carrier communication signals and interference signals,the extracted multi coupling interference signals include communication signals.Block the processed multi coupling interference signal,calculate its correlation coefficient with the sparse coefficient vector of the normal communication signal,and obtain the coupling features.Based on these features,a multi coupling interference judgment model for carrier communication sample signals is constructed.By calculating the similarity between carrier communication sample signals and multi coupling interference features,and comparing them with the decision threshold,multi coupling interference is removed.The experimental results show that the proposed method can more effectively suppress carrier communication interference,and under multiple operating conditions,the proportion of multi coupling interference signals is lower,fully confirming the reliability of the proposed method.
carrier communicationreliabilitycoupling interferencelow voltage transmission linescommunication interferencesynergistic inhibition
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